Delivery-compensating and recoil-deadening apparatus for water-mains



H. J. BOUVIER. DELIVERY COMPENSATING AND RECOl-L DEADENING APPARATUS FOR WATER MAINS I APPLICATION FILEDISEPT- 18, I919. 4

1,357,838. Patented Nov. 2, 1920 INVENTOR UNITE- STATES PATENT OFFICE.

HENRI JOSEPH BOUVIER, OF GBENOBLE, FRANCE.

Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed September 18, 1919. Serial No. 324,315.

Y '0 all to ham it may concern:

Be it known that I, HENRI J osnrrr BOU- VIER, a citizen of the Republic of France, and a resident of Grenoble, (lsere,) France, have invented new and useful Improvements in Delivery-Compensating and Recoil-Deadening Apparatus for lVater-Mains, of which the following is a specification.

Different types of delivery compensating apparatus are known, in which the actuating means of the water distributing devices are operatively connected to a discharge valve, which opens during a certain period of time when the water distributing devices are being closed. The saiddelivery compensating apparatus thus prevent, in some degree, recoils which may result from a more or less sudden closure of the water distributing devices; the apparatus, however, possess the disadvantage of being useless when recoils are due to opening suddenly the valves, which may have for effect the formation of waves having periods of compression. On the other hand it is very difficult if not impossible to compensate for all positions and displacements of the valves; overpressures resulting from closing the distributers are therefore far from being completely avoided. As, moreover, the delivery compensating valve is rigidly connected to the valves controlling the outlets of the water from the main the closure of such valves necessarily entails the opening of the compensating valve.

On the other hand, recoil deadeners for water mains are known, such as described in my pending U. S. Patent application Serial Number 251,305, filed August Zet, 1918, are intended to deaden recoil, whatever may be the cause, by avoiding all overpressure in the mains.

Such apparatus is automatic in the sense that the discharge valve is opened by an overpressure so soon as felt, whatever may be its cause; precisely by reason of this antomatic action however, it may happen exceptionally that by accident the dicharge valve cannot be moved or not in suficient rapidity at the commencement of an overpressure.

The present invention has for its object an apparatus comprising the combination of the two apparatus, delivery compensating apparatus and recoil deadener, above set,

is connectedby rigid members 29, p to a shaft P which controls the movement of the distributing valves of a turbine (or of apparatus utilizing the motive power of water under pressure); the connection is such that the end g rises when the distributing valves close, and falls when the valves open. The other end 9 ofv the lever G is connected a rigid rod 70 to the rod K of a piston which works in a cylinder C. V The piston K is provided with a second rod K which is connected, directly as illus trated, or indirectly to a second piston K* which works in a cylinder C.

The annular face of the piston K is always in communication through a system of pipes D, D D with the main B or with an independent pipe containing liquid under pressure so that when a pressure of water is established at C and C and the stresses exerted on both faces of the piston K are equal, the rod 71: is merely acted upon by the stress resulting from a pressure of water upon the annular face of the piston K*. The other face of the piston K is always at atmospheric pressure.

no or more spring valves N are provided in the piston K which open when the pressure at C becomes greater than the pressure at C if, however, the pressure at C becomes greater than that at C the valves are pressed upon their seatings.

The spaces 0 and C are in constant communication with each other through a pipe L having a coned valve M whose position,

and therefore the free passage for liquid, is commencing from this movement, the piston regulated as required by operating wheel or-the like.

The lower space C of the cylinder G is also in communication with the main B through a pipe D which contains at some point a valve cl; this valve opens when the pressure in the main becomes greater than that in the space C and closes in the reverse case.

a hand The upper portion C of the cylinderCis in communication through a pipe J and a valve H with an outlet pipe I.

The valve H is connected to a lever G by a connecting rod C and the lever G is jointed at g to the rod is of the piston K; 1

The other end 9 of the lever is connected by a connecting rod 5 to a piston A which works in a cylinder E. Vi ater under pressure passes from the main B and tube 1) and acts upon the upper face of the piston A which is also acted on by a constant force F (such as a counterweight or a spring having suflicient flexibility) equal and opposite to the-stress exerted on the piston A when the main B is at a pressure equal to the static pressure.

There willbe recognized from thefore- 0111 r b 1. A delivery compensator formed of the dicharge valve K the lever G the cylinder C and its piston K.

' 2. Ali-automatic recoil deadener consisting; of an over pressure indicator "formed of the cylinder E, the piston A and the 'counterwelght F; of a differential servomotor formed of cylinders C, (3*, pistons K, K and regulating valveM, of the valve H, and lastly'of the discharge valve K connected to the servo-motor which is capable of movement simultaneously with the piston K of the serv0-motor.

The apparatus works as follows First suppose that the distributers delivering water to the hydraulic apparatus which utilize the water power, are closed. The shaft P then turns in the direction of the arrow F The end g of the lever G is lifted and acts upon the piston K which however can only fall very slowly as the valve M leaves open a small passage only; on the other hand the valves N and (Z are on their seats. Thdischarge valve K therefore lifts, allowing a certain %uantity of water to flow away. The valve 1 3 continues to lift until the closing movement of the distributors is ended. 1

During these two simultaneous movements two cases may arise 1- (a) The lifting of the valve K is sufficient to prevent overpressure in the main B.

In this case the lifting movement of the valve K will cease simultaneously withthe closing movement of the distributers and l; which has been constantly urged by the pressure exerted on the piston K falls slowly, thus slowly closing the valve K The valve N is regulated in such a manner that the speed of closing the valve K can. lead to no overpressure in the main 13.

it may happen that during the two simultaneous movements of the distributing valves and of the valve 11?, the deliveries 7 5 have not been compensated with sufiicient exactness and that an overpressure is caused in the main B. In this case the overpressure acts upon the piston A which falls, thus rocking the lever G about its pivot g and in this case the valve H will fall, thus placingthe annular space (1 in communication with the outlet pipe I. The aressure at C becomes less and the piston is will rise, thus opening the discharge valve K at an increased speed and so preventii'ig the pro duction of any dangerous overpressure.

in this latter hypothesis, the delivery compensating apparatus and the recoil deadener act cumulatively and the two apparatus both coeperate, if necessary, to open the discharge valve K and both act to prevent any dangerous overpressure in the main. 7

Suppose now that the distributers open more orless rapidly. The distributers are opened by rotating the shaft P in the direction of the arrow F and has for effect to low-er the end 5/ of the lever G this lever therefore rocks about the pivot 9 the end 0 g rises because the valves N open to allow the upward movement of the piston K. The lever 9 thus rocks about its pivot g and the discharge valve K remains seatedQ The opening mover it of the distributors will cause a certainlowering of pressure in the main B and when the opening movement ceases, a wave is produced in the main which may be translated into an overpres-' sure which may be larger than in the first case leeause the distributers are opened more quickly. The automatic shock deadener now comes into operation. The piston A falls so soon as the overpressure makes itself felt, the valve H opens and causesa fall in pressure in the space C the piston ltl is then moved upward and causes'thedischarge valve K to lift. A flow of a certain quantity of water takes place through the discharge pipe 0, which has for effect to prevent the overpressure becoming dangerous, and also for effect immediately to deaden the undulatory phenomenon which might be generated unless the discharge.

' produced by the delivery compensating apparatus which is rigidly connected with the movement of the distributers for Water under pressure; the two apparatus are thus supplementary and their combination in sures security of working in all cases.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:-

1. A delivery compensating and recoil deadening apparatus for Water mains, comprising an indicator piston constantly subjected on one face to the pressure in the main, counter pressure means constantly acting on the other face of said piston for balancing to a certain limit the said pressure in the main, a servo-motor, means for operatively connecting the indicator piston to a valve controlling the said servo-motor, means for operatively connecting the said control valve to the piston of the servomotor, means for supplying with a fluid under pressure the cylinder of the servomotor, means for throttling the flow of liquid from one side of the said cylinder to the other side, means for operatively connecting the piston of the servo-motor to a discharge valve and to the actuating means of the water distributing devices mounted on the main.

2. A delivery compensating and recoil deadening apparatus for water m ains, comprising an indicator piston constantly subjected on one face to the pressure in the main, counter pressure means constantly acting on the other face of said piston for balancing the static pressure exerted in the main, a servo-motor, means for operatively connecting the indicator piston to a valve controlling the said servo-motor, means for operatively connecting the said control valve to the piston of the servo-motor, means for supplying with a fluid under pressure the cylinder of the servo-motor, means for throttling the flow of liquid from one side of the said cylinder to the other side, means for operatively connecting the piston of the servo-motor to a discharge valve and to the actuating means of the water distributing devices mounted on the main.

3. A delivery compensating and; recoil deadening apparatus, comprising an indicator piston constantly subjected on one face to the pressure in the main,--counterpressure means constantly acting on the other face of said piston for balancing the static pressure in the main,a servo-motor with a differential piston, comprising a first piston, with equal annular faces, subjected on said both faces to the same pressure of a fluid, associated with an auxiliary piston, of dif ferent diameter, subjected but on one face to the pressure of a fluid,-a first cylinder but on one side with the fluid under pressure for the auxiliary piston, means for throttling the flow of fluid under pressure from one side to the other side of the first cylinder, means for operatively connecting the indicator piston to a valve controlling the servo-motor, means for operatively connecting the said control valve to the differential piston of the servo-motor, means for operatively connecting the said piston of the servo-motor to a discharge valve and to the actuating means of the water distributing devices mounted on the main.

4. A delivery compensating and, recoil deadening apparatus, comprising an indicator piston constantly subjected on one face to the pressure in the main,-counterpressure means constantly acting on the other face of said piston for balancing the static pressure in the main,- a servo-motor with a differential piston, comprising a first piston, with equal annular faces, subjected on said both faces to the same pressure of a fluid, associated with an auxiliary piston, of different diameter, subjected but on one face to the pressure of a fluid,-a first cylinder supplied on both sides with a fluid under pressure for the piston with equal annular surfaces,and a separate cylinder supplied but on one side with the fluid under pressure for the auxiliary piston, means for throttling the flow of fluid under pressure from one side to the other side of the first cylinder, automatic valves mounted in the piston with equal annular surfaces for the purpose described, means for operatively connecting the indicator piston to a valve controlling the servo-motor, means for operatively connecting the said control valve to the differential piston of the servomotor, means for operatively connecting the said piston of the servo motor to a discharge valve and to the actuating means of the water distributing devices mounted on the main. 7

5. A delivery compensating and recoil deadening apparatus, comprising an indicator piston constantly subjected on one face to the pressure in the main,-counterpressure means constantly acting on the other face of said piston for balancing the static pressure in the main,-a servo-motor with a differential piston, comprising a first piston, with equal annular faces, subjected on said both faces to the same pressure of a fluid, associated with an auxiliary piston, of different diameter, subjected but on one face to the pressure of a fluid,a first cylinder supplied on both sides with a fluid under pressure for the piston with equal annular surfaces,and a separate cylinder supplied but on one side with the fluid under pressure for the auxiliary piston, means i'or' throttling the flow o1" fluid under pressure from one side to the other side of the first cylinder, automatic valves mounted in the piston with equal annular surfaces for the purpose described, a lever operativeiy connecting the indicator piston, the control valve of the servo-motor andxthe diflerential piston of the letter, and another 10 lever oper'etively connecting the saiddiflerentiel piston of the servo-motor, the discharge valve and the actuetlng means 01 the water distributing devloes- In testimony whereof l have signed my name to this specification.

HENRI JOSEPH BOUVIER.

Witnesses:

HENRY PERROT, V JEAN CLAUDE MUzARn. 

